Cash Equivalents and Marketable Securities - Available-for-Sale Marketable Securities (Details) - USD ($) $ in Thousands	Jul. 31, 2024	Apr. 30, 2024	Jul. 31, 2023
Cash equivalents:
Amortized Cost	$ 133,820	$ 167,146	$ 206,442
Debt Securities, Available-for-Sale [Abstract]
Total cash equivalents and available-for-sale marketable securities, Amortized Cost	730,075	691,002
Total cash equivalents and available-for-sale marketable securities, Gross Unrealized Gain	532	69
Total cash equivalents and available-for-sale marketable securities, Gross Unrealized Loss	(162)	(630)
Total cash equivalents and available-for-sale marketable securities	730,445	690,441
Money market funds
Cash equivalents:
Amortized Cost	82,660	82,564
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Estimated Fair Value	82,660	82,564
Commercial paper
Cash equivalents:
Amortized Cost	14,340	18,769
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Estimated Fair Value	14,340	18,769
Debt Securities, Available-for-Sale [Abstract]
Amortized Cost	136,382	162,183
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Estimated Fair Value	136,382	162,183
U.S. treasury securities
Cash equivalents:
Amortized Cost	2,745	5,888
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Estimated Fair Value	2,745	5,888
Debt Securities, Available-for-Sale [Abstract]
Amortized Cost	7,203	2,497
Gross Unrealized Gains	5	0
Gross Unrealized Losses	0	0
Estimated Fair Value	7,208	2,497
Corporate debt securities
Cash equivalents:
Amortized Cost	1,985	0
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Estimated Fair Value	1,985	0
Debt Securities, Available-for-Sale [Abstract]
Amortized Cost	357,849	310,557
Gross Unrealized Gains	453	64
Gross Unrealized Losses	(135)	(526)
Estimated Fair Value	358,167	310,095
Certificates of deposit
Debt Securities, Available-for-Sale [Abstract]
Amortized Cost	80,332	62,017
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Estimated Fair Value	80,332	62,017
U.S. government agencies securities
Debt Securities, Available-for-Sale [Abstract]
Amortized Cost	46,579	46,527
Gross Unrealized Gains	74	5
Gross Unrealized Losses	(27)	(104)
Estimated Fair Value	$ 46,626	$ 46,428

Cash And Cash Equivalents Accumulated Gross Unrealized Gain Before Tax

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Fair value portion of asset recognized for present right to economic benefit.

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Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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